"A slow moving weather system continues to bring rain to much of Western Alberta," says the Environment Canada website. "Rainfall from the system will gradually taper off through the weekend as the storm weakens."

High streamflow advisories have been issued for the Highwood, Sheep and Elbow rivers and the Bow River and its tributaries upstream of the Ghost Reservoir.

As much as 100 millimetres of precipitation has fallen in certain areas of southern Alberta since Wednesday morning, and the provincial government says another 30 millimetres is possible in the Bow River Basin.

It also says 75 millimetres could fall in the Red Deer and North Saskatchewan river basins.

The province says water levels have or are expected to rise rapidly, but no major flooding is expected.